AES/SHA1 Serial dongle

Description

I was concerned about securing my projects to my clients, having to burn some fuses in the chip is not enough, so i decided to add a small chip that acts as a key. the key has two modes , encode and decode configurable from a jumper switch.

The chip communicates through a serial port and uses aes or hash/sha1 encryption.

it can be used to validate a key before loading the main program or used to validate a section of the code.

I am still working on my prototype but will publish more details as i progress along.

*UPDATE 24/5/2017

I added TWI communication, it can now be wired in circuit and user can use the function to access the chip engine.

I added a 256kb rom keybase and alogarithm to extract a 10 bit key and calculate a checksum .

Writing arduino library to talk to chip with simple functions.

Discussions

jmcservv wrote 09/04/2017 at 10:51

You can , future projects will use stm32f103..

but i have a bunch of arduino mega 2560 projects .. this way i can secure it

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jmcservv wrote 06/11/2017 at 17:10

i am using this chip as a embeded key.

if the client tries to copy the project, the client wont be able to copy the program stored in the chip as it is encrypted ..

Are you sure? yes | no

Alexander wrote 05/24/2017 at 09:48

Hi!

For this task in present time i'm use stm32f100 + http://www.ti.com/tool/AES-128

Are you sure? yes | no

AES/SHA1 Serial dongle

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